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<div id="printheader"><h1 class="p_Heading1" style="page-break-after: avoid;"><span class="f_Heading1">属性 - 常规 - 字体头标志</span></h1>
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     <p class="crumbs"><b>导航：</b>&nbsp;编辑字体 &gt; 格式 &gt; 属性 &gt; 常规 &gt;</p>
     <h1 class="p_Heading1" style="page-break-after: avoid;"><span class="f_Heading1">属性 - 常规 - 字体头标志</span></h1>
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<p class="p_Normal">字体头标志(Font Header Flags)，提供有关字体的全局性信息。</p>
<p class="p_Normal"><img style="margin:0;width:3.7188in;height:3.7604in;border:none" src="fontcreator_042_font_header_flags.png"></p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">字体基线位置 Y=0 (Baseline for font at y=0)</span></p>
<p class="p_Normal">当所有字形的<a href="javascript:void(0);" onclick="return hmshowPopup(event, popid_1780635977, this);" class="popuplink">基线</a>处于 Y= 0 位置（即在 X 轴上）时，请设置此字段。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">左侧字承点位置 X=0 (Left side bearing point at x=0)</span></p>
<p class="p_Normal">当将最左边暗位(black bit)的 X 位置当作左侧字承线(left side bearing)时，请设置此字段。该字段可以忽略，因为在导出字体时，FontCreator 将确保正确设置该字段。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">指令可能取决于点数大小(Instructions may depend on point size)</span></p>
<p class="p_Normal">当存在依赖于点数大小的指令时，请设置此标志。指令可以显式地使用点数大小来代替每 EM 的像素数。这意味着，缩放一个 12 点的屏幕字体(screen font)来获得等效的打印机字体(printer font)，与直接请求一个 12 点的打印机字体，可能不会产生相同的结果。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">将 PPEm 强制为整数值，用于所有内部标量的数学运算(Force ppem to integer values for all internal scaler math)</span></p>
<p class="p_Normal">选择该字段时，将使用整数缩放而不是分数缩放。如果未选择此字段，则可以使用分数的 PPEm (每 Em 像素数)大小。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">指令可以改变预置宽度(Instructions may alter advance width)</span></p>
<p class="p_Normal">设置此字段时，允许字体更改相关宽度的设计(device)（<a href="advancewidth.html" class="topiclink">预置宽度</a>可能不会线性缩放）。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">苹果专用字段 5 (Apple specific field 5)</span></p>
<p class="p_Normal">这个字段应在这样的字体中设置，该字体打算纵向布局，并且其字形已绘制成 X 坐标为 0 符合所需的垂直<a href="javascript:void(0);" onclick="return hmshowPopup(event, popid_1780635977, this);" class="popuplink">基线</a>。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">保留字段(Reserved)</span></p>
<p class="p_Normal">保留字段，请不要勾选。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">苹果专用字段 7 (Apple specific field 7)</span></p>
<p class="p_Normal">如果字体需要以正确的语言学表达(linguistic rendering)方式（例如阿拉伯字体）进行布局，则应设置此字段。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">苹果专用字段 8 (Apple specific field 8)</span></p>
<p class="p_Normal">具有一个或多个变形特效的 GX 字体，应该设置此字段，这些变形特效被指定为默认出现。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">苹果专用字段 9 (Apple specific field 9)</span></p>
<p class="p_Normal">如果字体包含任何强型从右到左(strong right-to-left)书写的字形，则应设置此字段。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">苹果专用字段 10 (Apple specific field 10)</span></p>
<p class="p_Normal">如果字体包含印度语样式(Indic-style)的重排效果，则应设置此字段。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">字体数据是无损压缩格式(Font data is 'lossless')</span></p>
<p class="p_Normal">当字体数据是“无损”压缩格式时请设置此标志，也就是使用 Agfa MicroType Express 工具进行了压缩和解压缩。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">字体已转换(Font converted)</span></p>
<p class="p_Normal">已经转换的字体设置此标志（产生了兼容的度量）。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">针对 ClearType 优化的字体(Font optimised for ClearType)</span></p>
<p class="p_Normal">如果字体针对 ClearType 进行了优化，请设置此字段。</p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">最后手段字体(Last resort font)</span></p>
<p class="p_Normal">如果进行设置，则指明该字形只是指定代码点范围内的通用性符号表现，并不真正代表对这些代码点的支持。如果未进行设置，则指明该字形代表对这些代码点的真正支持。如果进行设置，FontCreator 将使用<a href="fc_last-resort-fonts.html" class="topiclink">压缩(compact)格式</a>来存储一定范围的映射到单个字形的字符。</p>
<p class="p_NoteorTip"><span class="f_NoteorTip">警告：FontCreator 能够导出最后手段字体，但 Windows 不支持使用该格式。现在 Mac OS X 支持“真正”的最后手段字体。如果要为 Windows 制作最后手段字体，请不要设置此选项。</span></p>
<p class="p_NormalHead" style="page-break-after: avoid;"><span class="f_NormalHead">保留字段(Reserved)</span></p>
<p class="p_Normal">保留字段，请不要勾选。</p>
<p style="margin: 0 0 0 0;"><span style="font-size: 10pt; font-family:Arial,Helvetica,sans-serif; color: #000000;">&nbsp;</span></p>
<p class="p_NoteorTip"><span class="f_NoteorTip">注意：Apple 专用字段应根据 Apple 的规范进行设置。但是，这些字段并未在 OpenType 中实现。</span></p>
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